As far as I am aware, the spoilers tag doesn't prevent the items from loading. So, the algo's that corporations and governments use, to keep inappropriate content off their network, can still catch what ever is in the spoiler.
For the most part, when the rules were written, FoH wasn't on most block lists (I dont know if it's still the case), and people could surf from work (I think we have a decent chunk of Gov employees). At best, if nudity gets flagged enough, coming from this site, through people's work ip, the site will be blocked, and at worst, people could get written up/fired.
Obl video: